Question

Carina spent a total of $5. 27 buying a pineapple for $3. 40 and some tomatoes that were on sale for $0. 85 per pound. To determine the number of pounds of tomatoes that she bought, x, Carina wrote and solved the equation as shown below. 3. 40 0. 85 x = 5. 27. 0. 85 x = 8. 67. X = 10. 2 pounds. Where, if anywhere, did Carina make an error? Carina did not make any errors. The initial equation that Carina wrote was incorrect. Carina should have subtracted 3. 40 from 5. 27. Carina should have divided 8. 67 by 0. 85.

Answer 1

The correct choice would be that Carina should have subtracted 3.40 from 5.27 which lead to wrong further calculation. So, the correct option from the quoted statement is B.

The calculation can be done to find the value of x after quoting the correct equation and solving by further using the simplification method.

Simplification of mathematical equation.

• The computation of the amount of tomatoes can be done after assuming that the initial equation given is right.

• With the given information, we can simplify further to find that,

• $3.40+0.85x = 5.27\\ \\ x= \dfrac{5.27-3.40}{0.85}\\ \\ x= 2.2$

• So, it is clear that Carina bought tomatoes worth 2.2USD

Hence, the correct choice is B, that Carina should have subtracted 3.40 from 5.27 to find the value of tomatoes bought.

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